Motion picture camera with exposure time prolonging means

Details Motion picture camera with exposure time prolonging means Motion picture camera with exposure time prolonging means

1974-12-05

1976-04-20

Hayes, Monroe H.

Optics: motion pictures

Shutters

Rotary

352180, 352194, G03B 910

Patent

active

039515311

ABSTRACT:
A rotary shutter of a motion picture camera comprises a pair of fan-shaped sectors which are capable of changing the angle of opening formed thereby. The sector shaft is rotated through a gear train by a claw driving shaft which in turn is rotated by a driving motor. The gear train comprises a pair of gear train means either of which is selectively used to transmit the rotation of the claw driving shaft to the sector shaft. The ratio of the rate of revolution of one shaft to that of the other is changed by changing the gear train means. A switchover means is provided to switchover the gear train from one to the other. The switchover means is associated with means for changing the angle of opening formed by the sectors. In the mode of the prolonged time exposure, the speed of revolution of the sector is reduced to the half of that of the sector in the mode of the normal motion picture. The claw is caused to be out of engagement with the perforation of the film during every other reciprocal movement of the claw so that the film will remain stationary during every other reciprocal movement of the claw to effect a prolonged exposure time.

REFERENCES:
patent: 3196457 (1965-07-01), Buck

Affiliated with

Also associated with

Rating

Motion picture camera with exposure time prolonging means does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Motion picture camera with exposure time prolonging means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motion picture camera with exposure time prolonging means will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1583380